Yazar "Akbulut, Mehmet" seçeneğine göre listele

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    A survey on the Brachyura (Crustacea, Decapoda) in the Dardanelles
    (2007) Çelik, E. Şanver; Ateş, A. Suat; Akbulut, Mehmet
    This study is on the Decapoda Brachyura found in the Dardanelles, included in the Turkish Straits system. Samples of Brachyura were collected at different depths (0-40 m) at 5 stations chosen in the Dardanelles, using a set fishing net and scuba divers during 1998-1999. A total of 19 species belonging to the Brachyura was identified, and 12 of these are new records for the Dardanelles. However. Parthenope angulifrons Latreille, 1825 is reported from the Turkish Straits system for the first time. © TÜBITAK.
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    A survey on the Brachyura (Crustacea, Decopoda) in the Dardanelles
    (2007) Çelik, E. Şanver; Ateş, A. Suat; Akbulut, Mehmet
    Bu çalışma Türk Boğazlar Sistemine dahil olan Çanakkale Boğazı'nda bulunan Brachyura (Decapoda)'lar üzerinedir. Brachyura örnekleri 1998-1999 peryodu sırasında uzatma balıkçı ağları ve SCUBA dalış yöntemi kullanılarak Çanakkale Boğazı'ndan seçilen 5 istasyonun farklı derinliklerinden (0-40 m) toplanmıştır. Brachyura'lara ait toplam 19 tür tanımlanmış ve bunlardan 12'si Çanakkale Boğazı için yeni kayıttır. Bununla birlikte, Parthenope angulifrons Latreille, 1825 Türk Boğazlar Sisteminden ilk kez rapor edilmektedir.
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    Assessment of Surface Water Quality in the Atikhisar Reservoir and Saricay Creek (Canakkale, Turkey)
    (Foundation Environmental Protection & Research-Fepr, 2010) Akbulut, Mehmet; Kaya, Hasan; Celik, Ekrem Sanver; Odabasi, Deniz Anil; Odabasi, Serpil Sagir; Selvi, Kahraman
    This study was carried out to evaluate the surface water quality of the Atikhisar Reservoir and Sari ay Creek. Multivariate statistical techniques such as Cluster analysis (CA), principal component analysis (PCA), multidimensional Scaling (MDS), and univariate statistical techniques such as two-way ANOVA were used to analyze the data. Three different groups were formed based on Cluster analysis. Two-way ANOVA test results showed that interaction effects of any variables of the reservoir were non-significant but the interaction effects of pH in the creek were significant. Temperature (T), electrical conductivity (EC), oxygen saturation (OS), biological oxygen demand (BOD), chemical oxygen demand (COD), total phosphate (TP), total nitrate (TN), salinity (Sal), pH, Chl-a, and total suspended solids (TSS) of the reservoir were significantly different among seasons. While differences of T, EC, DO, TP, Chl-a, and TSS of the Sari ay Creek were significant among seasons, only the differences of temperature among the stations were significant. Multi dimensional scaling (MDS) analysis results revealed that the variables such as EC, Sal, OS, T and TN affected the differences among the sites, while the other variable groups were showing a similarity with the COD, BOD, TSS, AD, TP, pH, DO and Chl-a. The principle component analysis (PCA) results showed that the eigenvalues of the first 5 PCA were larger than 1.00, suggesting that they explained 98 % of the total variation.
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    Assessment of surface water quality in the atikhisar reservoir and sarıçay creek (Çanakkale, Turkey)
    (Cevkor Vakfi, 2010) Akbulut, Mehmet; Kaya, Hasan; Çelik, Şanver; Odabaşi, Deniz Anil; Sa?ir Odabaşi, Serpil; Selvi, Kahraman
    This study was carried out to evaluate the surface water quality of the Atikhisar Reservoir and Sari{dotless}çay Creek. Multivariate statistical techniques such as cluster analysis (CA), principal component analysis (PCA), multidimensional Scaling (MDS), and univariate statistical techniques such as two-way ANOVA were used to analyze the data. Three different groups were formed based on Cluster analysis. Two-way ANOVA test results showed that interaction effects of any variables of the reservoir were non-significant but the interaction effects of pH in the creek were significant. Temperature (T), electrical conductivity (EC), oxygen saturation (OS), biological oxygen demand (BOD), chemical oxygen demand (COD), total phosphate (TP), total nitrate (TN), salinity (Sal), pH, Chl-a, and total suspended solids (TSS) of the reservoir were significantly different among seasons. While differences of T, EC, DO, TP, Chl-a, and TSS of the Sari{dotless}çay Creek were significant among seasons, only the differences of temperature among the stations were significant. Multi dimensional scaling (MDS) analysis results revealed that the variables such as EC, Sal, OS, T and TN affected the differences among the sites, while the other variable groups were showing a similarity with the COD, BOD, TSS, AD, TP, pH, DO and Chl-a. The principle component analysis (PCA) results showed that the eigenvalues of the first 5 PCA were larger than 1.00, suggesting that they explained 98 % of the total variation.
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    Barajların Akarsulardaki Besin Ağı ve Balıkların Trofik İlişkileri Üzerine Etkileri
    (2015) Yalçın Özdilek, Şükran; Jones, Roger Irvin; Odabaşı, Deniz Anıl; Odabaşı, Serpil; Akgül, Rıza; Akbulut, Mehmet; Özdilek, Hasan Göksel
    Bu projede bir akarsuyun kaynağından denize döküldüğü yere kadar besin ağlarının nasıl değişim gösterdiğini ve akarsu boyunca kurulmuş olan barajların besin ağı ve balıkların trofik ilişkilerini nasıl etkilediğini ortaya koymak amaçlanmıştır. Birinci amacı gerçekleştirmek üzere Karamenderes Nehri üzerinde belirlenen dokuz istasyondan üç mevsimde örnekleme yapılmıştır. Ayrıca barajların etkisini araştırmak üzere Yaz 2013?de ve İlkbahar 2014?de birer örnekleme yapılmıştır. Örneklemelerde çeşitli örnek toplama araçları kullanılarak alg, makrofit, detritus, makrobentos ve balık örnekleri toplanmış ortamın bazı fiziksel ve kimyasal parametrelerine ait veriler toplanmıştır. Toplanan biyolojik örnekler olabildiğince tür düzeyine kadar teşhis edilmiş, her bir ortamdaki bolluk ve çeşitlilikleri belirlenmiştir. Çeşitli besin organizmaları ve balıkların kas örneklerinden alınan örneklerde kütle spektrofotometresi kullanılarak d13C ve d15N analizleri yapılmıştır. S. cii ve C. gibelio türlerinin sindirim kanalı içerikleri analiz edilmiştir. Örnekleme sonucunda elde edilen kararlı izotop sonuçları kullanılarak herbir istasyon ve mevsim için besin ağları ve dominant balık türü olan S. cii ve istilacı tür olan C. gibelio taksonu için niş genişlikleri, besin çakışmaları hesaplanmıştır. Akarsu boyunca besin ağında yer alan balıkların izotopik nişleri ve çakışmaları SIAR-R programı kullanılarak hesaplanmıştır. Akarsu boyunca yapılan fizikokimyasal analiz sonuçlarına göre; Yaz 2012 örneklemesinde akarsuyun üst kolu olmasına rağmen Karaköy 1 istasyonunda organik kirlilik göstergesi olan AKM, ortofosfat, TOK, Turbidite ve ÇO gibi parametreler yan kol olan Karaköy 2 istasyonuna göre yüksek çıkmıştır, bu istasyonda Karaköy yerleşim biriminin deşarj bölgesi bulunmaktadır. Özellikle yaz aylarında akarsuyun barajlarda tutulması, organik madde yükünü arttırmış olabilir. Genellikle 63?m dane boyutuna sahip katı maddedeki organik karbon içeriğinin yüksek olması bunu doğrular niteliktedir. Karamenderes boyunca perifiton, plankton, makrofit ve bentik makroomurgasız komunite yapısının tür çeşitliliği ve birey bolluğu bakımından istasyon ve mevsime göre faklılık gösterdiği ortaya konulmuştur. Acısu karakterinde olan Kumkale kapalı istasyonunda bentik makroomurgasız faunasının diğer istasyonlardan farklı olduğu tespit edilmiştir. Karamenderes boyunca S. cii hemen her istasyonda bulunmuş, bu türü B. oligolepis ve G. gobio izlemiştir. Sindirim kanalı içeriklerine göre mevsim ve istasyonlara göre değişmekle birlikte C. gibelio ve S. cii türleri için trofik seviyeler 2-3,5 arasında, S. cii ve B. oligolepis türlerinin izotopik trofik düzeyleri mevsimlere ve istasyonlara göre değişmekle birlikte en yüksek değer iki tür için sırasıyla 4,3 ve 4,1 en düşük değer ise 1,88 ve 2,4 olarak hesaplanmıştır. Sarmısaklı istasyonunda hem sindirim kanalı hem de izotop verilerine göre çakışmalar bulunmaktadır. Karamenderes boyunca nehrin yukarıdan aşağıya balıkların d15N oranlarında her üç mevsimde de barajdan hemen sonra ani bir düşme ile birlikte göreceli bir artış gözlenmiştir. Akarsu boyunca balıkların d13C oranlarında her üç mevsimde de akarsuyun üst kısımlarında düşük, orta kesimleri olan Mollahasanlar Sarmısaklı arasında yüksek, nehir ağzı bölgesinde tekrar bir düşme olacak şekilde değişim görülmüştür. S. cii dört barajın hem alt hem üst istasyonlarında bulunmaktadır ve her bir istasyon ve mevsimde farklı besin grupları ile beslenmektedir. Sindirim kanalı içeriklerine göre Bayramiç barajı hariç diğer barajların alt kesimlerinde diyet çeşitliliği yüksek olarak bulunmuştur. Organizmaların besin ağındaki pozisyonları barajların üst ve alt kesimlerinde farklılık göstermektedir.
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    Çanakkale boğazı'ndaki petrol kirliliği'nin bazı littoral ve sessil flora ve fauna üzerine etkilerinin araştırılması
    (2007) Tunçer, Sezginer; Alpaslan, Mustafa; Akbulut, Mehmet; Çelik, Şanver Ekrem; Odabaşı, Sağır Serpil; Odabaşı, Anıl Deniz
    [Abstract Not Available]
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    Çanakkale ili' nin önemli içsuları ve kirletici kaynakları
    (2006) Akbulut, Mehmet; Odabaşı, Serpil Sağır; Odabaşı, Deniz Anıl; Çelik, Ekrem Şanver
    Bu çalışmanın amacı Çanakkale ilindeki bazı önemli göl, gölet, akarsu ve baraj göllerinin fiziko-kimyasal özelliklerini önceki yapılan çalışmalardan derlenmesi ve kirleten etmenlerin belirlenmesidir. Çanakkale ilinde çeşitli sektörlere ait 234 adet sanayi tesisi bulunmaktadır. Ayrıca tarımsal amaçlı kullanılan, 338 bin hektar arazide önemli miktarda gübre kullanılmaktadır. Buna ilaveten bazı yerleşim yerlerinde çevre, insan sağlığını ve sucul ekosistemi tehdit eden katı atık ve kanalizasyon problemleri bulunmaktadır. Bu ön çalışmada Çanakkale İli'ndeki iç su kaynaklarının ve kirletici etmenler ve kirlettiği alanlar belirlenerek ileride bölgede yapılabilecek bilimsel araştırmalara yol göstermesi amaçlanmıştır.
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    Changing of mollusca fauna in comparison with water quality: Saricay creek and atikhisar reservoir models (Canakkale-Turkey)
    (2009) Akbulut, Mehmet; Odabasi, Deniz Anil; Kaya, Hasan; Celik, Ekrem Sanver; Yildirim, M. Zeki; Odabasi, Serpil; Selvi, Kahraman
    Species composition, abundance and monthly distribution of the Mollusca fauna and the physicochemical variables of Saricay Creek and Atikhisar Reservoir have been investigated between September 2005-August 2006. Mollusca fauna in Saricay Creek and Atikhisar Reservoir was represented by 21 species of Gastropoda and 8 species of Bivalvia. Diversity, dominance and frequency were recorded monthly. By assessing the data via Shannon-Wiener index, Saricay Creek had an index of 2.58 richness at 8th station while, third station in Atikhisar Reservoir had the poorest with an index of 0.02. According to Bray-Curtis similarity index, the first and third stations were found to be very similar to each other, while 8th and 66 h stations were observed to be the most different from all of the other stations in terms of the dynamics of mollusca fauna. Dreissena polmorpha were the most dominant of 47.16% and frequent species of 48.96%, especially encountered in the Atikhisar Reservoir. The results of One-way Analysis of Similarity (ANOSIM) showed that mollusca compositions were significantly different between sampling sites (p<0.05). ANOSIM and Similarity Percentage analysis (SIMPER) revealed significant differences and a high degree of community dissimilarity within and between the sampling stations. The relationship between the dynamics of organisms and environmental parameters were analyzed using Canonical Correspondence Analysis. This study pointed out that water quality parameters especially COD, BOD, Anionic Detergent, salinity, TP, TN, temperature were effective on the abundance and distribution of Mollusca fauna. © Medwell Journals, 2009.
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    Changing of Mollusca Fauna In Comparison With Water Quality: Saricay Creek and Atikhisar Reservoir Models (Canakkale-Turkey)
    (Medwell Online, 2009) Akbulut, Mehmet; Odabasi, Deniz Anil; Kaya, Hasan; Celik, Ekrem Sanver; Yildirim, M. Zeki; Odabasi, Serpil; Selvi, Kahraman
    Species composition, abundance and monthly distribution of the Mollusca fauna and the physicochemical variables of Saricay Creek and Atikhisar Reservoir have been investigated between September 2005-August 2006. Mollusca fauna in Saricay Creek and Atikhisar Reservoir was represented by 21 species of Gastropoda and 8 species of Bivalvia. Diversity, dominance and frequency were recorded monthly. By assessing the data via Shannon-Wiener index, Saricay Creek had an index of 2.58 richness at 8th station while, third station in Atikhisar Reservoir had the poorest with an index of 0.02. According to Bray-Curtis similarity index, the first and third stations were found to be very similar to each other, while 8th and 66 h stations were observed to be the most different from all of the other stations in terms of the dynamics of mollusca fauna. Dreissena polmorpha were the most dominant of 47.16% and frequent species of 48.96%, especially encountered in the Atikhisar Reservoir. The results of One-way Analysis of Similarity (ANOSIM) showed that mollusca compositions were significantly different between sampling sites (p<0.05). ANOSIM and Similarity Percentage analysis (SIMPER) revealed significant differences and a high degree of community dissimilarity within and between the sampling stations. The relationship between the dynamics of organisms and environmental parameters were analyzed using Canonical Correspondence Analysis. This study pointed out that water quality parameters especially COD, BOD, Anionic Detergent, salinity, TP, TN, temperature were effective on the abundance and distribution of Mollusca fauna.
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    Comparison of heavy metal concentrations on European Chub (Leuciscus cephalus L, 1758) from sariçay Creek and atikhisar reservoir (Çanakkale - Turkey)
    (Parlar Scientific Publications, 2015) Selvi, Kahraman; Kaya, Hasan; Akbulut, Mehmet; Tulgar, Arinç
    The aim of this study was to evaluate some heavy metals concentration (Zn, Pb, Cd, Cu, Fe and Mn) in the water and also in gill, liver, muscle, kidney tissues of European Chub species sampled from Atikhisar Reservoir and Sariçay Creek. As a result of study, it was revealed that the heavy metal levels of the water samples, taken from Sariçay Creek, are statistically higher than the samples, extracted from the Atikhisar Reservoir (p<0.05). All metals, examined within the tissues of the fish from Sariçay Creek were also found out to be statistically higher than the ones from Atikhisar Reservoir (p<0.05). Consequently, this research suggest that the levels of Pb, Cd and Zn, accumulated in the fish samples, which were caught from Sariçay Creek, exceed the limits that are suitable for human consumption. In conclusion, it is estimated that the fish that may be consumed from Sariçay Creek may impair to human health. © by PSP.
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    COMPARISON OF HEAVY METAL CONCENTRATIONS ON EUROPEAN CHUB (Leuciscus cephalus L., 1758) FROM SARICAY CREEK AND ATIKHISAR RESERVOIR (CANAKKALE - TURKEY)
    (Parlar Scientific Publications (P S P), 2015) Selvi, Kahraman; Kaya, Hasan; Akbulut, Mehmet; Tulgar, Arinc
    The aim of this study was to evaluate some heavy metals concentration (Zn, Pb, Cd, Cu, Fe and Mn) in the water and also in gill, liver, muscle, kidney tissues of European Chub species sampled from Atikhisar Reservoir and Saricay Creek. As a result of study, it was revealed that the heavy metal levels of the water samples, taken from Saricay Creek, are statistically higher than the samples, extracted from the Atikhisar Reservoir (p<0.05). All metals, examined within the tissues of the fish from Saricay Creek were also found out to be statistically higher than the ones from Atikhisar Reservoir (p<0.05). Consequently, this research suggest that the levels of Pb, Cd and Zn, accumulated in the fish samples, which were caught from Sal-way Creek, exceed the limits that are suitable for human consumption. In conclusion, it is estimated that the fish that may be consumed from Saricay Creek may impair to human health.
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    Decapod crustaceans of the coast along the Historical National Park of the Gallipoli Peninsula, Turkey
    (Brill Academic Publishers, 2007) Ates, A. Suat; Cirik, Sukran; Celik, E. Sanver; Akbulut, Mehmet; Aslan, Herdem
    During recent faunistic samplings, a total of 57 species of decapod crustaceans was collected in the coastal waters of the Historical National Park located on the Gallipoli Peninsula (including the northeastern Aegean Sea and Dardanelles). The samples were taken at depths ranging between W and 28 m at 10 different stations chosen along the coasts of the peninsula in July, 2005. A total of 1425 individuals belonging to 57 species was identified. The dominance of the species varies in each ecological zone; the caridean, Philocheras trispinosus (Hailstone, 1835) was commonest, with a dominance value of 13.79%.
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    DESCRIPTION OF A NEW PSEuDOBITHYNIA N. SP (GASTROPODA: BITHYNIIDAE) FROM NORTHWEST TURKEY
    (Conchological Soc Great Britain & Ireland, 2013) Odabasi, Deniz Anil; Kebapci, Umit; Akbulut, Mehmet
    The Family Bithyniidae widely distributed in the Balkans and is represented by two genera in Europe: Bithynia and Pseudobithynia. More recent data about the Bithyniidae shows that the majority of family members are distributed in the Balkans and especially Greece. Seven species of Bithynia but only one of Pseudobithynia is currently known from Turkey. This study is aimed at describing a new species, Pseudobithynia yildirimi n. sp. from the Biga Peninsula in northwestern Turkey. Pseudobithynia yildirimi n. sp. is compared to related taxa in Turkey, as well as in Greece and neighbouring Iran. The penis variability and status of pseudo-maleness in P. yildirimi were also investigated.
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    Description of a new pseudobithynia n. sr (Gastropoda: Bithyniidae) from Northwest Turkey
    (2013) Odabaşi, Deniz Anil; Kebapçi, Ümit; Akbulut, Mehmet
    The Family Bithyniidae widely distributed in the Balkans and is represented by two genera in Europe: Bithynia and Pseudobithynia. More recent data about the Bithyniidae shows that the majority of family members are distributed in the Balkans and especially Greece. Seven species of Bithynia but only one of Pseudobithynia is currently known from Turkey. This study is aimed at describing a new species, Pseudobithynia yildirimi n. sp.from the Biga Peninsula in northwestern Turkey. Pseudobithynia yildirimi n. sp. is compared to related taxa in Turkey, as well as in Greece and neighbouring Iran. The penis variability and status of pseudo-maleness in P. yildirimi were also investigated.
  • Küçük Resim
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    Doğal Kaynakların Kullanımı ve Sürdürülebilirliği Açısından Su Ürünleri Sektörünün Mevcut Durumu ve SWOT Analizi : Türkiye TR22 Bölgesi Örneği
    (Çanakkale Onsekiz Mart Üniversitesi Dr. H. İbrahim Bodur Girişimcilik Uygulama ve Araştırma Merkezi, 2014) Tan, Sibel; Seki, İsmail; Akbulut, Mehmet
    Marmara Denizi, Çanakkale Boğazı ve Ege Denizi’ne kıyısı bulunan Balıkesir ve Çanakkale İlleri, su ürünleri üretimi açısından özel bir konumda yer almakta ve önemli bir üretim potansiyeline sahiptir. Bu çalışmada TR22 bölgesi olarak adlandırılan Balıkesir ve Çanakkale İllerinde su ürünleri üretim potansiyeli, sektörün sosyo-ekonomik yapısı, su ürünleri sanayinde pazarlama, örgütlenme ve dış ticaret durumunun incelenmesi amaçlanmıştır. Bölgede sektör temsilcileri ile yapılan görüşmeler neticesinde sektörün mevcut durumu ortaya konulmuş ve SWOT analizi yapılmıştır. Yapılan değerlendirmeler sonucunda doğal kaynakların kullanımı ve sürdürülebilirliği açısından kısa, orta ve uzun vadeli stratejiler belirlenmiştir. Yapılan çalışma sonucunda bölgede su ürünleri sektöründe faaliyet gösteren işletmelerin 80 yıllık bir geçmişe sahip olduğu, sektörde çalışanların eğitim seviyesinin tarım sektörünün diğer alt sektörlerinde çalışanlardan daha yüksek olduğu tespit edilmiştir. İşletmelerin büyük kısmının pazarlama sorunu olmadığı ve ihracat yaptığı belirlenmiştir. Bu işletmelerde kredi ve teşviklerden yararlanma oranı ve hibe projesi desteklerinden faydalanma oranının yüksek olmadığı da çalışmadan elde edilen bir sonuçtur.
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    Effects of some heavy metals on hatching of fertilized eggs in four marine fish species in Aliaga Bay (Eastern Aegean Sea), Turkey
    (Asian Journal Of Chemistry, 2008) Bulut, Musa; Akbulut, Mehmet; Ates, A. Suat; Mendes, Mehmet
    The present study was carried out to determine the effects of some heavy metals Such as Cd, Mn, Zn on hatching success of fertilized eggs of four marine fish species, Dicentrarchus labrax (Linnaeus, 1758), Spat-Lis aurata (Linnaeus, 1758), Dentex dentex (Linnaeus, 1758), Lithognathus mormyrus (Linnaeus, 1758) in Aliaga Bay (Eastern Aegean Sea). The relationships between heavy metal concentrations in eggs and their hatching success were determined by multiple linear regression analysis. Results showed that magnitude and type of the effects of the three heavy metals studied in this research on egg hatching ratios differed based on fish species. In terms of the magnitude of the effect, Zn has a greater effect than Cd and Mn on the hatching in D. dentex, while it is smaller in D. labrax. The effects-of Zn on egg hatching are in the same direction and about the same level for S. aurata and L mormyrus.
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    EFFECTS OF SUBCHRONIC EXPOSURE TO PHOSALONE ON OXIDATIVE STRESS AND HISTOPATHOLOGICAL ALTERATIONS IN COMMON CARP (Cyprinus carpio, L., 1758)
    (Taylor & Francis Inc, 2013) Kaya, Hasan; Celik, Ekrem Sanver; Gurkan, Mert; Yılmaz, Sevdan; Akbulut, Mehmet
    In this study, possible oxidative stress, biomarkers, and histopathological alterations were investigated in common carp (Cyprinus carpio, L., 1758) that were exposed to various phosalone concentrations in vivo. Fish were exposed to 0.15, 0.3, and 0.6 mg/L phosalone concentrations in a semistatic regime for 14 d. Biomarkers, including Na+, K+-ATPase, reduced glutathione (GSH), thiobarbituric acid-reactive substances (TBARS), and histopathological changes, were determined in gills, liver, and kidney tissues of fish. Sublethal phosalone concentrations produced lipid peroxidation and impairment in the antioxidant defense system by increasing reactive oxygen species (ROS) production. While GSH increased in all groups at d 7 compared to control, GSH fell significantly at medium and high doses at d 14. Reduced GSH levels were diminished in all tissues and a significant induction in lipid peroxidation (TBARS) was observed. Na+,K+-ATPase enzyme activity was significantly inhibited especially in gills. No histopathological effects were observed in the control group. Lamellar aneurysm, lamellar fusion, hyperplasia, epithelial lifting, and hemorrhages were observed in gill tissues exposed to phosalone. Histopathological effects in the liver tissues of fish exposed to phosalone were characterized by cytoplasmic vacuolation, congestion, hypertrophy, and nuclear degeneration. Hypertrophy, tubule degeneration, mononuclear cell infiltration, and dilation of glomerular capillaries were noted in kidney tissues exposed to phosalone. The results indicate that phosalone exposure adversely affected the health of the fish, attributable to oxidative stress.
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    Effects of subchronic exposure to zinc nanoparticles on tissue accumulation, serum biochemistry, and histopathological changes in tilapia (Oreochromis niloticus)
    (Wiley, 2017) Kaya, Hasan; Duysak, Muge; Akbulut, Mehmet; Yılmaz, Sevdan; Guerkan, Mert; Arslan, Zikri; Demir, Veysel
    Zinc nanoparticles (ZnNPs) are among the least investigated NPs and thus their toxicological effects are not known. In this study, tilapia (Oreochromis niloticus) were exposed to 1 and 10 mg/L suspensions of small size (SS, 40-60 nm) and large size (LS, 80-100 nm) ZnNPs for 14 days under semi-static conditions. Total Zn levels in the intestine, liver, kidney, gill, muscle tissue, and brain were measured. Blood serum glucose (GLU), glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), and lactate dehydrogenase (LDH) were examined to elucidate the physiological disturbances induced by ZnNPs. Organ pathologies were examined for the gills, liver, and kidney to identify injuries associated with exposure. Significant accumulation was observed in the order of intestine, liver, kidney, and gills. Zn levels exhibited time- and concentration-dependent increase in the organs. Accumulation in kidney was also dependent on particle size; NPs SS-ZnNPs were trapped more effectively than LS-ZnNPs. No significant accumulation occurred in the brain (p>0.05) while Zn levels in muscle tissue increased only marginally (p0.05). Significant disturbances were noted in serum GOT and LDH (p<0.05). The GPT levels fluctuated and were not statistically different from those of controls (p>0.05). Histopathological tubular deformations and mononuclear cell infiltrations were observed in kidney sections. In addition, an increase in melano-macrophage aggregation intensity was identified on the 7th day in treatments exposed to LS-ZnNPs. Mononuclear cell infiltrations were identified in liver sections for all treatments. Both ZnNPs caused basal hyperplasia in gill sections. Fusions appeared in the gills after the 7th day in fish treated with 10 mg/L suspensions of SS-ZnNPs. In addition, separations in the secondary lamella epithelia were observed. The results indicated that exposure to ZnNPs could lead to disturbances in blood biochemistry and cause histopathological injuries in the tissues of O. niloticus. (c) 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 1213-1225, 2017.
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    Effects of Waterborne Lead Exposure in Mozambique Tilapia: Oxidative Stress, Osmoregulatory Responses, and Tissue Accumulation
    (Wiley, 2015) Kaya, Hasan; Akbulut, Mehmet
    We studied the oxidative stress and osmoregulatory damage as well as the accumulation of lead in Mozambique Tilapia Oreochromis mossambicus exposed to different sublethal concentrations-low, medium, and high (0.5, 2.5, and 5.0 mg/L)-of waterborne lead for 14 d in a semistatic condition. The accumulated levels of Na+, K+-ATPase, glutathione (GSH), and thiobarbituric acid reactive substances (TBARS) were determined from samples of gill, liver, intestine, brain, kidney, and muscle tissues. At the end of the experiment, the GSH levels of most tissues were higher in the treated group than in the control group (especially in the liver and kidney) but lower in the intestine. The levels of TBARS in the gill and brain tissues of the fish exposed to high lead doses were significantly higher than those of fish in the control group. Na+, K+-ATPase activity seemed to be significantly inhibited in the gill, intestine, and brain tissues across all treatment groups. At the end of the study, the total amount of lead that had accumulated within the various tissues ranked as follows: intestines > kidney > brain > gill > liver > muscle. Our findings suggest that sublethal concentrations of lead can disrupt the health of Mozambique Tilapia and cause oxidative stress and osmoregulatory damage.
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    Öğe
    Freshwater and brackish water malacostraca (Crustacea-Arthropoda) fauna of Sinop and Samsun and their ecology
    (2009) Akbulut, Mehmet; Ustaoğlu, M. Ruşen; Çelik, Ekrem Şanver
    Sinop ve Samsun İl sınırları içinde toplanan tatlısu ve acısu Malacostraca faunası 181 istasyondan Şubat 1999-Ekim 2000 tarihleri arasında araştırılmıştır. 134 istasyonda 15 genusa ait 19 tür ve 4 alttür toplam olarak da 23 taksa bulunmuştur: İTİ Amphipoda'ya, 6'sı Decapoda'ya, 4'ü İsopoda'ya, 2'si Mysidacea'ye aittir. Tespit edilen türlerden Limnomysis benedeni Türkiye faunası için yeni kayıttır. Diğer türlerden Gammarus pulex pulex, G. aequicauda, G. uludagi, G. komareki, G. longipedis, G. balcanicus, Echinogammarııs ischnus, Orchestia stepherıseni Paramysis kosswigi, Idotea baltica basteri, ldotea hectica, Sphaeroma serratum, Palaemon adspersus, Crangon crangon, Potamorı ibericum tanricum ve Carcinus aestuarii verilen lokalitelerde ilk defa tespit edilmiştir. Potamon ibericum tauricum en yaygın ve en çok istasyonlarda rastlanan tür olmuştur.